refactor(web-player): centralise styles and drop dead code

Styles: adds the scrim and on-art tokens so the black overlays and the
white marks drawn over artwork stop being raw tailwind colours, and
routes every component through the semantic layer instead of reaching
into the --mf-* palette. Renames --mf-accent-60, which was actually an
80% mix, to --mf-accent-soft, and removes the unused --mf-radius and
the --color-neutral-950 override.

Dead code: the root +layout.server.ts already redirects everything
except /login, so the anonymous branches in the home and explore loads
and the needsAuth empty state could never run. Deletes the unused
accentSoft helper, and stops exporting helpers nobody imports.

fmtTime and fmtDate move out of theme/color.ts into $lib/format.ts;
they are not colour concerns.

The accent animation now cancels its pending frame on teardown.

web-player/src/lib/components/Sidebar.svelte

@@ -69,7 +69,7 @@
 			? 'text-fg'
 			: 'text-fg-3 hover:bg-hover hover:text-fg'}"
 	>
-		<link.icon class="h-6 w-6 shrink-0" style={active ? 'color:var(--mf-accent-60)' : ''} />
+		<link.icon class="h-6 w-6 shrink-0 {active ? 'text-accent-soft' : ''}" />
 		{link.label}
 	</a>
 {/snippet}
@@ -87,10 +87,7 @@
 				: ''}"
 			style="top:{pillTop}px; height:{pillHeight}px; opacity:{pillVisible ? 1 : 0}"
 		>
-			<span
-				class="absolute inset-y-0 left-0 w-[3px] rounded-r-full"
-				style="background:var(--mf-accent-60)"
-			></span>
+			<span class="absolute inset-y-0 left-0 w-[3px] rounded-r-full bg-accent-soft"></span>
 		</div>
 
 		<nav class="relative z-10 flex flex-col gap-1">

web-player/src/lib/components/player/SeekBar.svelte

@@ -1,6 +1,6 @@
 <script lang="ts">
 	import { player } from '$lib/player/player.svelte';
-	import { fmtTime } from '$lib/theme/color';
+	import { fmtTime } from '$lib/format';
 
 	function seek(event: MouseEvent) {
 		const rect = (event.currentTarget as HTMLElement).getBoundingClientRect();
@@ -23,11 +23,11 @@
 			style="width:{player.progressPercent}%"
 		></div>
 		<span
-			class="pointer-events-none absolute top-1/2 h-3 w-3 -translate-x-1/2 -translate-y-1/2 rounded-full bg-white opacity-0 shadow-[0_1px_4px_rgba(0,0,0,0.5)] transition-opacity duration-75 group-hover:opacity-100"
+			class="pointer-events-none absolute top-1/2 h-3 w-3 -translate-x-1/2 -translate-y-1/2 rounded-full bg-on-art opacity-0 shadow-[0_1px_4px_rgba(0,0,0,0.5)] transition-opacity duration-75 group-hover:opacity-100"
 			style="left:{player.progressPercent}%"
 		></span>
 	</button>
-	<span class="text-xs text-(--mf-text-4) tabular-nums">
+	<span class="text-xs text-muted tabular-nums">
 		{fmtTime(player.current.duration)}
 	</span>
 </div>

web-player/src/lib/components/player/VolumeControl.svelte

@@ -17,7 +17,7 @@
 		oninput={handleVolumeChange}
 		aria-label="Volumen"
 		class="mf-volume"
-		style="background:linear-gradient(to right, var(--mf-accent-60) {player.volume}%, var(--mf-track) {player.volume}%)"
+		style="background:linear-gradient(to right, var(--color-accent-soft) {player.volume}%, var(--color-track) {player.volume}%)"
 	/>
 </div>
 
@@ -37,14 +37,14 @@
 		width: 12px;
 		height: 12px;
 		border-radius: 50%;
-		background: var(--mf-text);
+		background: var(--color-fg);
 		cursor: pointer;
 	}
 	.mf-volume::-moz-range-thumb {
 		width: 12px;
 		height: 12px;
 		border-radius: 50%;
-		background: var(--mf-text);
+		background: var(--color-fg);
 		border: none;
 		cursor: pointer;
 	}

web-player/src/lib/components/ui/Button.svelte

@@ -38,7 +38,7 @@
 		primary: 'bg-accent-soft font-semibold text-on-accent active:scale-[0.97]',
 		secondary: 'border border-line text-fg hover:bg-hover',
 		subtle: 'bg-surface-2 font-semibold text-fg hover:bg-surface-hover',
-		danger: 'bg-danger font-semibold text-white hover:brightness-110'
+		danger: 'bg-danger font-semibold text-on-accent hover:brightness-110'
 	};
 
 	const classes = $derived(

web-player/src/lib/components/ui/Modal.svelte

@@ -68,7 +68,7 @@
 
 {#if open}
 	<div
-		class="animate-fade fixed inset-0 z-[60] grid place-items-center bg-black/70 p-4 backdrop-blur-sm"
+		class="animate-fade fixed inset-0 z-[60] grid place-items-center bg-scrim/70 p-4 backdrop-blur-sm"
 		role="presentation"
 		onclick={onBackdropClick}
 	>

web-player/src/lib/components/ui/NowPlaying.svelte

@@ -13,10 +13,10 @@
 	];
 </script>
 
-<div class="absolute inset-0 flex items-end justify-center gap-[2.5px] bg-black/45 pb-2">
+<div class="absolute inset-0 flex items-end justify-center gap-[2.5px] bg-scrim/45 pb-2">
 	{#each bars as bar, i (i)}
 		<span
-			class="w-[3px] origin-bottom rounded-full bg-white"
+			class="w-[3px] origin-bottom rounded-full bg-on-art"
 			style="height:14px; animation:equalize {bar.dur}s ease-in-out {bar.delay}s infinite; animation-play-state:{paused
 				? 'paused'
 				: 'running'}"

web-player/src/lib/format.ts

@@ -0,0 +1,12 @@
+export function fmtTime(seconds: number): string {
+	const total = Math.max(0, Math.floor(seconds || 0));
+	const minutes = Math.floor(total / 60);
+	const rest = total % 60;
+	return `${minutes}:${rest < 10 ? '0' : ''}${rest}`;
+}
+
+const dateFormatter = new Intl.DateTimeFormat('es', { dateStyle: 'medium' });
+
+export function fmtDate(value: string | number | Date): string {
+	return dateFormatter.format(new Date(value));
+}

web-player/src/lib/player/player.svelte.ts

@@ -40,7 +40,7 @@ export interface ApiTrackLike {
 	isExplicit?: boolean;
 }
 
-export function isYouTubeTrack(track: ApiTrackLike): boolean {
+function isYouTubeTrack(track: ApiTrackLike): boolean {
 	return track.source === 'YouTube';
 }
 

web-player/src/lib/server/youtube.ts

@@ -1,7 +1,7 @@
 import type { createApiClient } from '$lib/server/api';
 import type { YouTubeSong } from '$lib/types';
 
-export const YOUTUBE_FILLER_QUERIES = [
+const YOUTUBE_FILLER_QUERIES = [
 	'pop',
 	'rock',
 	'reggaeton',
@@ -24,7 +24,7 @@ export interface YoutubeFiller {
 	continuationToken: string;
 }
 
-export function pickRandomFillerQuery(): string {
+function pickRandomFillerQuery(): string {
 	return YOUTUBE_FILLER_QUERIES[Math.floor(Math.random() * YOUTUBE_FILLER_QUERIES.length)];
 }
 

web-player/src/lib/theme/color.ts

@@ -15,23 +15,6 @@ export function accentForHue(hue: number): string {
 	return `oklch(${ACCENT_LIGHTNESS}% ${ACCENT_CHROMA} ${hue})`;
 }
 
-export function accentSoft(hue: number, pct: number): string {
-	return `color-mix(in srgb, ${accentForHue(hue)} ${pct}%, transparent)`;
-}
-
 export function gradientForHue(hue: number): string {
 	return `linear-gradient(135deg, oklch(70% 0.15 ${hue}), oklch(36% 0.13 ${hue + 28}))`;
 }
-
-export function fmtTime(seconds: number): string {
-	const total = Math.max(0, Math.floor(seconds || 0));
-	const minutes = Math.floor(total / 60);
-	const rest = total % 60;
-	return `${minutes}:${rest < 10 ? '0' : ''}${rest}`;
-}
-
-const dateFormatter = new Intl.DateTimeFormat('es', { dateStyle: 'medium' });
-
-export function fmtDate(value: string | number | Date): string {
-	return dateFormatter.format(new Date(value));
-}

web-player/src/lib/theme/theme.css

@@ -16,7 +16,10 @@
 	--mf-track: rgba(255, 255, 255, 0.12);
 
 	--mf-accent: oklch(60% 0.17 145);
-	--mf-accent-60: color-mix(in oklch, var(--mf-accent) 80%, transparent);
-	--mf-radius: 12px;
+	--mf-accent-soft: color-mix(in oklch, var(--mf-accent) 80%, transparent);
+
+	--mf-scrim: #000000;
+	--mf-on-art: #ffffff;
+
 	--mf-sidebar-w: 264px;
 }

web-player/src/lib/tracks.ts

@@ -30,7 +30,7 @@ export function targetCoverSrc(target: TrackTarget): string | undefined {
 	return target.kind === 'youtube' ? target.song.thumbnailUrl : undefined;
 }
 
-export function queueIdForTarget(target: TrackTarget): string | number {
+function queueIdForTarget(target: TrackTarget): string | number {
 	return target.kind === 'youtube' ? target.song.videoId : queueIdForTrack(target.track);
 }
 

web-player/src/routes/(app)/explore/+page.server.ts

@@ -1,5 +1,5 @@
 import type { PageServerLoad, Actions } from './$types';
-import { createApiClient, unwrapOrError } from '$lib/server/api';
+import { createApiClient, requireUser, unwrapOrError } from '$lib/server/api';
 import { fetchYoutubeFiller } from '$lib/server/youtube';
 import { addTrackAction, addYouTubeToPlaylistAction } from '$lib/server/playlistActions';
 import { EXPLORE_PAGE_SIZE as PAGE_SIZE, YOUTUBE_FILLER_LIMIT } from '$lib/config';
@@ -8,23 +8,21 @@ export const load: PageServerLoad = async ({ url, locals, fetch }) => {
 	const query = url.searchParams.get('q')?.trim() ?? '';
 	const page = Math.max(1, Number(url.searchParams.get('page')) || 1);
 
+	const user = requireUser(locals, url);
 	const api = createApiClient({ fetch, accessToken: locals.accessToken ?? undefined });
 
 	const tracksPromise = api.GET('/tracks', {
 		params: { query: { name: query || undefined, pageNumber: page, pageSize: PAGE_SIZE } }
 	});
 
-	const searchPromise =
-		query && locals.accessToken
-			? api.GET('/youtube/search', { params: { query: { query } } })
-			: Promise.resolve(null);
-
-	const playlistsPromise = locals.user
-		? api.GET('/playlists/users/{userId}', {
-				params: { path: { userId: locals.user.sub }, query: { pageNumber: 1, pageSize: 50 } }
-			})
+	const searchPromise = query
+		? api.GET('/youtube/search', { params: { query: { query } } })
 		: Promise.resolve(null);
 
+	const playlistsPromise = api.GET('/playlists/users/{userId}', {
+		params: { path: { userId: user.sub }, query: { pageNumber: 1, pageSize: 50 } }
+	});
+
 	const [tracksRes, searchRes, playlistsRes] = await Promise.all([
 		tracksPromise,
 		searchPromise,
@@ -41,8 +39,7 @@ export const load: PageServerLoad = async ({ url, locals, fetch }) => {
 		youtubeFiller: query
 			? Promise.resolve(null)
 			: fetchYoutubeFiller(api, locals.accessToken, YOUTUBE_FILLER_LIMIT),
-		playlists: playlistsRes?.data?.items ?? [],
-		needsAuth: !locals.user
+		playlists: playlistsRes?.data?.items ?? []
 	};
 };
 

web-player/src/routes/(app)/explore/+page.svelte

@@ -84,9 +84,7 @@
 
 	const hasMore = $derived(localHasNext || ytContinuation !== '');
 
-	const nothingFound = $derived(
-		!!data.query && items.length === 0 && !data.needsAuth && !data.ytError
-	);
+	const nothingFound = $derived(!!data.query && items.length === 0 && !data.ytError);
 
 	function buildHref(query: string) {
 		return query ? `/explore?q=${encodeURIComponent(query)}` : '/explore';
@@ -212,12 +210,7 @@
 		<InfiniteScroll onLoadMore={loadMore} {hasMore} loading={loadingMore} />
 	{/if}
 
-	{#if data.needsAuth}
-		<EmptyState
-			icon={Music}
-			description="Inicia sesión para ver también resultados de YouTube Music."
-		/>
-	{:else if data.ytError}
+	{#if data.ytError}
 		<EmptyState
 			icon={Music}
 			description="YouTube Music no está disponible ahora mismo. Inténtalo de nuevo."

web-player/src/routes/(app)/library/+page.svelte

@@ -4,7 +4,8 @@
 	import X from '@lucide/svelte/icons/x';
 	import Music from '@lucide/svelte/icons/music';
 	import { player, toQueueItems } from '$lib/player/player.svelte';
-	import { hueFor, fmtTime, fmtDate } from '$lib/theme/color';
+	import { hueFor } from '$lib/theme/color';
+	import { fmtTime, fmtDate } from '$lib/format';
 	import Page from '$lib/components/ui/Page.svelte';
 	import PageHeader from '$lib/components/ui/PageHeader.svelte';
 	import EmptyState from '$lib/components/ui/EmptyState.svelte';

web-player/src/routes/(app)/playlists/[id]/components/PlaylistTrackTable.svelte

@@ -9,7 +9,8 @@
 		youTubeThumbnailUrl,
 		type ApiTrackLike
 	} from '$lib/player/player.svelte';
-	import { hueFor, fmtTime, fmtDate } from '$lib/theme/color';
+	import { hueFor } from '$lib/theme/color';
+	import { fmtTime, fmtDate } from '$lib/format';
 	import Badge from '$lib/components/ui/Badge.svelte';
 	import IconButton from '$lib/components/ui/IconButton.svelte';
 	import TrackTable from '$lib/components/ui/TrackTable.svelte';

web-player/src/routes/(app)/playlists/[id]/components/SuggestionsTable.svelte

@@ -7,7 +7,8 @@
 		type ApiTrackLike,
 		type QueueItem
 	} from '$lib/player/player.svelte';
-	import { hueFor, fmtTime } from '$lib/theme/color';
+	import { hueFor } from '$lib/theme/color';
+	import { fmtTime } from '$lib/format';
 	import type { YouTubeSong } from '$lib/types';
 	import SectionHeading from '$lib/components/ui/SectionHeading.svelte';
 	import IconButton from '$lib/components/ui/IconButton.svelte';

web-player/src/routes/+layout.svelte

@@ -52,18 +52,19 @@
 			if (t < 1) rafId = requestAnimationFrame(tick);
 		};
 		rafId = requestAnimationFrame(tick);
+		return () => cancelAnimationFrame(rafId);
 	});
 </script>
 
 <svelte:head><link rel="icon" href={favicon} /></svelte:head>
 
-{#if isAuthPage}
+{#if isAuthPage || !data.user}
 	<div class="min-h-screen bg-bg text-fg antialiased">
 		{@render children()}
 	</div>
 {:else}
 	<div class="flex min-h-screen bg-bg text-fg antialiased">
-		<Sidebar user={data.user!} />
+		<Sidebar user={data.user} />
 		<div class="flex min-w-0 flex-1 flex-col">
 			<main class="flex-1 transition-[padding] {hasTrack ? 'pb-[92px]' : 'pb-0'}">
 				{#key page.url.pathname}

web-player/src/routes/+page.server.ts

@@ -1,24 +1,23 @@
 import type { PageServerLoad, Actions } from './$types';
-import { createApiClient, playlistCoverTrackIds } from '$lib/server/api';
+import { createApiClient, playlistCoverTrackIds, requireUser } from '$lib/server/api';
 import { fetchYoutubeFiller, shuffle } from '$lib/server/youtube';
 import { addTrackAction, addYouTubeToPlaylistAction } from '$lib/server/playlistActions';
 import { HOME_LATEST_PAGE_SIZE, YOUTUBE_FILLER_LIMIT } from '$lib/config';
 import { pickGreeting } from '$lib/server/greeting';
 
-export const load: PageServerLoad = async ({ locals, fetch }) => {
+export const load: PageServerLoad = async ({ locals, url, fetch }) => {
+	const user = requireUser(locals, url);
 	const api = createApiClient({ fetch, accessToken: locals.accessToken ?? undefined });
 
 	const latestPromise = api.GET('/tracks', {
 		params: { query: { pageNumber: 1, pageSize: HOME_LATEST_PAGE_SIZE } }
 	});
-	const playlistsPromise = locals.user
-		? api.GET('/playlists/users/{userId}', {
-				params: { path: { userId: locals.user.sub }, query: { pageNumber: 1, pageSize: 12 } }
-			})
-		: Promise.resolve({ data: undefined });
-	const recentlyPlayedPromise = locals.user
-		? api.GET('/users/{id}/listening-history', { params: { path: { id: locals.user.sub } } })
-		: Promise.resolve({ data: undefined });
+	const playlistsPromise = api.GET('/playlists/users/{userId}', {
+		params: { path: { userId: user.sub }, query: { pageNumber: 1, pageSize: 12 } }
+	});
+	const recentlyPlayedPromise = api.GET('/users/{id}/listening-history', {
+		params: { path: { id: user.sub } }
+	});
 
 	const [latest, playlists, recentlyPlayed] = await Promise.all([
 		latestPromise,

web-player/src/routes/+page.svelte

@@ -171,7 +171,7 @@
 <section class="relative overflow-hidden page-x pt-11 pb-16">
 	<div
 		class="pointer-events-none absolute inset-0 blur-[70px] saturate-150"
-		style="background:linear-gradient(135deg, var(--mf-accent), color-mix(in oklch, var(--mf-accent), black 55%));animation:breathe 9s ease-in-out infinite"
+		style="background:linear-gradient(135deg, var(--color-accent), color-mix(in oklch, var(--color-accent), black 55%));animation:breathe 9s ease-in-out infinite"
 	></div>
 	<div class="animate-enter relative flex flex-col gap-2.5">
 		<p class="tracking-[0.14em] text-fg-2 uppercase">{data.greeting}</p>

web-player/src/routes/layout.css

@@ -2,7 +2,6 @@
 
 @theme {
 	--font-sans: 'Inter Variable', ui-sans-serif, system-ui, sans-serif;
-	--color-neutral-950: #08080a;
 
 	--color-bg: var(--mf-bg);
 	--color-elevated: var(--mf-elevated);
@@ -18,8 +17,10 @@
 	--color-fg-3: var(--mf-text-3);
 	--color-muted: var(--mf-text-4);
 	--color-accent: var(--mf-accent);
-	--color-accent-soft: var(--mf-accent-60);
-	--color-on-accent: #ffffff;
+	--color-accent-soft: var(--mf-accent-soft);
+	--color-on-accent: var(--mf-on-art);
+	--color-scrim: var(--mf-scrim);
+	--color-on-art: var(--mf-on-art);
 	--color-danger: oklch(63.7% 0.237 25.331);
 	--color-danger-fg: oklch(88.5% 0.062 18.334);
 

web-player/src/routes/login/+page.svelte

@@ -12,7 +12,7 @@
 </svelte:head>
 
 <div class="grid min-h-screen place-items-center bg-bg px-6 text-fg">
-	<div class="flex w-full max-w-[440px] flex-col items-center gap-9 text-center">
+	<div class="flex w-full max-w-110 flex-col items-center gap-9 text-center">
 		<div class="text-3xl font-extrabold tracking-tight">Musify</div>
 
 		<div>